Lichenomphalia alpina (Britzelm.) Redhead, Lutzoni, Moncalvo & Vilgalys syn. Omphalina luteovitellina (Pilát & Nannf.) M. Lange syn. O. flava (Cooke) M. Lange (illustrated life size) Cap 0.7–1.5cm across, convex then flattened, margin wavy; bright yellow. Stem 10–20×2–4mm; concolorous with cap or paler. Flesh concolorous; thin. Gills strongly decurrent, thick and fleshy, few; pale yellowish. Spores 6.5–9.5×3.5–4¼, elliptical. Spore print white. Habitat on mountains, usually above 750m, especially on peat covered with algal scum; autumn. Rare. Not edible.